Battery pack cooling device of electric car

Abstract

The invention discloses a battery pack cooling device of an electric car. The battery pack cooling device comprises a compressor, a gas-liquid separator, a car inside condenser, a car outside heat exchanger, a car inside heat exchanger, an air channel and a battery pack cooling device body. A first connecting pipeline and a second connecting pipeline are arranged between the battery pack cooling device body and the car inside condenser, a third connecting pipeline and a fourth connecting pipeline are arranged between the battery pack cooling device body and the car inside heat exchanger, so that when outdoor temperature is too high, cooling fluid in the third connecting pipeline carries out heat exchange with refrigerating fluid in the car inside heat exchanger and then flows to the battery pack cooling device body from the fourth connecting pipeline, therefore, a battery pack is cooled, the temperature of the battery pack is prevented from being too high, and efficient and safe operating of batteries is guaranteed. When the outdoor temperature is too low, cooling fluid in the first connecting pipeline carries out heat exchange with refrigerating fluid in the car inside condenser and then flows to the battery pack cooling device body from the second connecting pipeline, and therefore the battery pack is fast preheated. The battery pack cooling device is good in heat dispersion performance and long in runtime.

Description

Technical field: [0001] The invention belongs to the technical field of electric vehicles, and in particular relates to a cooling device for battery packs of electric vehicles. Background technique: [0002] In recent years, countries all over the world are advocating energy conservation and environmental protection. With the increase of automobile sales in my country, the carbon emissions of automobiles are also getting higher and higher. The research focus of the automobile industry is gradually shifting to the low-carbon field. Compared with gasoline, electric vehicles The traditional automobile powered by the battery has shown outstanding advantages in terms of environmental protection and energy saving. The electric vehicle air conditioning system keeps the temperature, humidity, and freshness in the vehicle within a certain range, maintaining the comfort of the electric vehicle. The electric vehicle air conditioning system has become an important part of the electric ve...

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Problems solved by technology

[0004] For this reason, the technical problem to be solved by the present invention is that the heat pump air-conditioning system used for electric vehicles in the prior art consumes a lot of power, has low heating efficiency, and the battery pack used for electric vehicles generates large heat and low heat dissipation efficiency. Thereby a kind of electric vehicle battery pack cooling device is proposed

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